JPS6218421Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is used to prevent leakage on the inner surface of a pipe by bonding the tube to the inner surface of the pipe buried underground using an adhesive. It relates to a device that is used.

[Conventional technology]

When repairing a leak in a pipe buried underground, excavating the land around the leak and repairing it from outside the pipe requires a lot of labor and time, especially when there are multiple leak points. Not only that, but there are also problems that hinder traffic on the ground. In order to improve this, the inventor of the present invention developed a method to prevent leakage from inside the pipe by expanding a thermoplastic tube inserted into the pipe with heated compressed air and heat-sealing it to the pipe wall. A method (Japanese Patent Publication No. 15221/1983) was proposed earlier, but this method has the disadvantage of requiring a large amount of thermal energy, especially when the inner volume of the tube is large.

On the other hand, by applying adhesive to the inner surface of the tube to be repaired, inserting a flexible tube into the tube, and inflating the tube by blowing compressed air into the tube, A possible method is to adhere this tube to the inner surface of the tube using the adhesive described above to prevent leakage of the tube.

[Problem that the invention attempts to solve]

However, when using this method, if you apply adhesive to the inner surface of the tube and then pull the tube into the tube, it is time-consuming to pull the tube into the tube, and the adhesive hardens, resulting in a weak bond. There is a risk that this may lead to a decrease in

The present invention was developed based on these circumstances, and its purpose is to simultaneously apply adhesive to the inner surface of the tube and draw the flexible tube into the tube, thereby reducing the number of man-hours required. It is an object of the present invention to provide a pipe leakage prevention installation device that can reduce the amount of time required and allow flexible tubes to be bonded before the adhesive hardens.

[Means for solving problems]

In other words, the present invention has a large-diameter peripheral edge that slides against the inner surface of the tube intended to prevent leakage at one end, and a small-diameter peripheral edge that faces the inner surface of the tube with a small gap at the other end. In addition, an adhesive applicator body has a circumferential groove formed between the large-diameter peripheral portion and the small-diameter peripheral portion to be filled with adhesive, and the adhesive applicator body is connected to the groove of the main body to supply adhesive to the groove. The pipe is characterized by comprising an adhesive conduit and a connecting part that removably connects the end of a flexible tube provided on the other end side of the main body and adhered to the inner surface of the pipe via the adhesive. do.

[Effect]

According to this configuration, the tube is connected to the connection part of the adhesive applicator main body, and the main body is pulled into the pipe to prevent leakage with the large diameter peripheral side facing forward, and the adhesive is drawn from the adhesive conduit. When the main body is moved in the axial direction of the tube while being supplied to the groove of the main body, the adhesive supplied to the groove is applied to the inner surface of the tube from the small gap between the small diameter peripheral edge at the rear end of the main body and the inner surface of the tube. At the same time, the tube is pulled into the tube. Therefore, the adhesive can be applied to the inner surface of the tube and the tube can be drawn into the tube at the same time.

[Example of idea]

Hereinafter, the present invention will be explained based on an illustrated embodiment.

FIG. 1 shows the configuration of an adhesive applicator 10 as a leak prevention construction device according to the present invention.
The main body 11 has a main body 11 having a diameter of 2. In front of groove 12,
The rear peripheral walls 13 and 14 are provided with O-rings 15 and 16 attached to their peripheral edges, respectively. The front O-ring 15 is in sliding contact with the inner surface of the tube 1 to prevent leakage, and the rear O-ring 16 is in sliding contact with the inner surface of the tube 1 to prevent leakage. It is configured to face the inner surface of the tube 1 with a small gap 17 therebetween. Further, an adhesive conduit 20 is connected to the cylindrical portion 18 forming the bottom of the groove 12 through a connector 19 so as to be able to communicate with the groove 12 . The main body 11 has a peripheral wall 13 on the front end side and a lid 21 detachably attached, and a rope 7 for moving the dispensing machine 10 within the pipe 1 is connected to the center of the lid 21. A universal joint 22 is provided.

Note that the rear ends of a plurality of ropes may be connected to the peripheral edge of the front peripheral wall 13, and the front ends of these ropes may be connected to the rope 7 all at once.

Appropriate guide means 23 is provided on the front end side peripheral wall 13 as necessary.

The rear end of the main body 11 is provided with a connecting portion 25 to which the front end portion 24a of the interior tube 24 can be connected detachably. The connecting portion 25 in the illustrated example connects the front end portion 24a of the tube 24 with the rear end side peripheral wall 14.
Although it is composed of a ring 26 for holding the ring 26 and a plurality of bolts 27 for supporting the ring 26, it may have any other configuration.

A method of performing leakage prevention work in the pipe 1 using such an adhesive applicator 10 will be explained in the order of steps based on FIGS. 2 to 5.

In Fig. 2, if a pipe 1 buried underground is leaking near point A, parts of the pipe 1 exposed in shafts B and C (or manholes, if available) on both sides of point A are removed, and the inner surface of the remaining part is cleaned in advance. A compressed air source 2 is installed on one side of the shaft B,
A winch 3 is arranged on the other side of the shaft C.

When cleaning the tube 1, for example, as shown in FIG. 2, the insertion block 4 is airtightly inserted into the tube 1 from the well B side, and the tube end is closed with a lid 5. Then, compressed air is fed into the tube 1 from the compressed air source 2 via the connecting tube 6, and the inserted mass 4 is pushed by this air pressure, causing B.
Move it from side to C side. One end of the rope 7 is connected to the insertion mass 4, and if necessary, by pulling the rope 7, the insertion mass 4 is pulled back to one side and cleaning is performed multiple times. When the cleaning process is completed, the inserted lump 4 is removed from the rope 7 and transferred to the ground from the shaft C, and the rope 7 is left inserted into the pipe with one end connected to the winch 3.

When the above-mentioned pre-process is completed, the adhesive applicator 1 of FIG.
Import 0. In the shaft B, one end of the adhesive conduit 20 is connected to the connector 19 of the adhesive applicator 10, and the front end 24a of the interior tube 24 is connected via the connecting portion 25. Also,
The other end of the conduit 20 is connected to a suitable adhesive supply source (not shown).
Connect with. Furthermore, a rope 7 (or other appropriate cable that is inserted into the pipe 1 via the rope 7 and connected to the winch 3 at one end) is connected to the universal joint 22.
The other ends are connected and the applicator 10 is inserted into the tube 1. Then, the groove 12 is filled with adhesive from the adhesive supply source through the conduit 20, and the winch 3 passes the adhesive through the rope 7 to the applicator 10 as shown in FIG.
is moved from the pit B side to the C side. Since the applicator 10 moves in the forward direction of the O-ring 15 on the large-diameter side, the adhesive being filled and supplied into the groove 12 with this movement spreads through the small gap between the O-ring 16 on the small-diameter side and the inner surface of the tube 1. 17, the adhesive is supplied to the inner surface of the tube 1 and applied to the inner surface of the tube. The thickness of the adhesive on the inner surface of the tube is approximately equal to that of the small gap 17. At the same time, the tube 24 is drawn into the pipe 1 as the applicator 10 moves, and when the applicator 10 reaches the end of the pipe on the other shaft C side, the first
The process ends.

Next, a coating machine 10 as shown in FIG. 4 is locked to the C-side tube end using appropriate locking means 8.
Further, the end of the tube on the one side of the shaft B is closed with the end of the tube 24 by the lid 5,
The tube 24 is supplied from the compressed air source 2 via the connecting pipe 6 in substantially the same manner as in the cleaning operation in the previous step.
Inject compressed air into the This allows tube 2
4 expands and is pressed against the inner surface of the tube 1 through the adhesive applied thereto. At this time, excess adhesive is collected via the groove 12 and the conduit 20 to the adhesive supply source. In this way, when the tube 24 is almost entirely stuck to the inner surface of the tube 1, the compressed air inside is once released, and the second step is completed.

Next, one end of the conduit 20 and the front end 24a of the tube 24 are removed from the coating machine 10, the conduit 20 is recovered from the shaft B side, and the coating machine 10 is transferred from the shaft C side to the ground.

After the front end 24a of the tube 24 is brought into close contact with the inner surface of the tube 1, the C-side tube end is closed with the lid 9 as shown in FIG.
Compressed air is again introduced into the inside of the container to keep it in an expanded state until the adhesive is substantially cured, and the pressure is maintained at a predetermined value or higher. Then, when the time required for curing the adhesive has elapsed, the third step is completed.

After that, the compressed air inside the pipe is released, the connecting pipe 6 and the lids 5 and 9 are removed, and the pipe section removed in the previous step in Fig. 2 is connected.Then, the holes B and C are filled and the compressed air is All operations are completed by removing supply sources and other equipment.

It goes without saying that the material and dimensions of the tube 24 are appropriately set depending on the tube 1 and the fluid flowing through it, as well as the temperature at the time of construction, but it is possible to plastically deform at room temperature. A material made of flexible synthetic resin (for example, a latex coating woven with nylon, a tube, etc.) is suitable. Further, the adhesive is preferably one that can be cured at room temperature and has an appropriate curing time (eg, epoxy resin, etc.).

According to the embodiment described above, since the work of applying the adhesive inside the tube 1 and the work of pulling in the tube 24 can be done simultaneously, the tube 24 is then crimped onto the inner surface of the tube 1 by being expanded with compressed air. This reduces both labor and time required, making the work easier and greatly improving efficiency. Moreover, since there is no need to heat when bonding the tubes, not only does it not require a heat source, but it can also be applied to large-diameter tubes, contributing to resource and energy savings.

Note that the present invention is not limited to the above-mentioned embodiments; for example, the pipe 1 may be curved, inclined or vertical, or may be placed on the ground.

Further, the adhesive applicator 10 can be modified in various ways without departing from the structure of the present invention.
If necessary, instead of gluing the tube 24 over the entire length of the tube 1, it may be bonded only to a desired section.

[Effect of idea]

As described above, the present invention is an adhesive that has a circumferential groove in which the large-diameter peripheral edge on one end slides in contact with the inner surface of the tube, and the small-diameter peripheral edge on the other end faces the inner surface of the tube with a small gap. The adhesive applicator main body, an adhesive conduit communicating with the groove and supplying adhesive to the groove, and a means provided in the main body capable of connecting the front end of the interior tube, can be used to apply the adhesive. When the machine body is moved inside the pipe with its one end side large diameter periphery facing forward, the adhesive in the groove is applied to the inner surface of the pipe through the small gap, and at the same time, the interior tube connected to this main body is moved inside the pipe. can be drawn into. Therefore, the work of applying adhesive to the inner surface of the tube and the work of pulling the tube into the pipe can be performed at the same time, reducing the number of work steps and improving efficiency. In particular, since it does not require much effort to draw the tube into the pipe, the tube can be inflated before the adhesive hardens and the tube can be bonded to the inner surface of the tube via the adhesive, allowing for strong bonding. Become.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is a sectional view showing an adhesive applicator, and FIGS. 2 to 5 are process illustrations. 1...Pipe, 2...Compressed air source, 3...Winch, 5, 9...Lid, 7...Rope, 10...Adhesive applicator, 11...Main body, 12...Groove, 13,1
4...Side wall, 17...Small gap, 20...Adhesive conduit, 24...Tube, 25...Connecting portion.

Claims (1)

[Scope of utility model registration request] It has a large-diameter peripheral edge that slides on the inner surface of the tube on one end side, and a small-diameter peripheral edge that faces the inner surface of the tube with a small gap on the other end, and the large-diameter peripheral edge and the small-diameter peripheral edge an adhesive applicator body having a circumferential groove between which adhesive is filled; an adhesive conduit connected to the groove of the body to supply adhesive to the groove; and a small-diameter peripheral side of the body. and a connecting part that removably connects the end of a flexible interior tube that is attached to the inner surface of the pipe via the above-mentioned adhesive. Device.